Having a bit of an issue with my Slots/Signals. I have distilled the code down to basics and am using it in a scratch project to help figure it out. I have run this in debug mode and placed a breakpoint in the moc file where the signal runs. Sure enough, it hits. However, the initStuff method is only being called once.

manager.h
Qt Code: 
  1. #ifndef MANAGER_H
  2. #define MANAGER_H
  3.  
  4. #include <QObject>
  5.  
  6. class Manager : public QObject
  7. {
  8.     Q_OBJECT
  9. public:
  10.     static Manager* instance();
  11.     static void init();
  12.     void start();
  13.     bool hasStuff() {return mStuff.size() > 0;}
  14. private:
  15.     explicit Manager(QObject *parent = 0);
  16.     static Manager* _instance;
  17.  
  18.     QList<Channel*> mStuff;
  19.     void processStuff();
  20.     void loadStuffQueue();
  21.  
  22. signals:
  23.     void emptyQueue();
  24.  
  25. public slots:
  26.     void initStuff();
  27. };
  28.  
  29. #endif // MANAGER_H
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manager.cpp
Qt Code: 
  1. #include "manager.h"
  2.  
  3. Manager::Manager(QObject *parent) :
  4.     QObject(parent)
  5. {
  6.     mThread = new QThread(0);
  7.     moveToThread(mThread);
  8. }
  9.  
  10. void Manager::init()
  11. {
  12.     _instance = new Manager();
  13.     connect(_instance, SIGNAL(emptyQueue()), _instance, SLOT(initStuff()));
  14.     _instance->initStuff();
  15.     _instance->start();
  16. }
  17.  
  18. void Manager::start() {
  19.     if(mStuff.size() > 0) {
  20.         instance()->processStuff();
  21.     } else {
  22.         emit emptyQueue();
  23.     }
  24. }
  25.  
  26.  
  27. void Manager::initStuff()
  28. {
  29.     //if there is stuff to put in the mStuff -- put it in there
  30. }
  31.  
  32.  
  33. void Manager::processStuff()
  34. {
  35.     //here is where process stuff and empty the Stuff queue
  36.     //when queue is empty we emit
  37.     emit emptyQueue();
  38. }
  39.  
  40. Manager* Manager::instance()
  41. {
  42.     if (_instance == 0) {
  43.         _instance = new DSManager();
  44.     }
  45.     return _instance;
  46. }
  47. Manager* Manager::_instance;
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main.cpp — relevant code
Qt Code: 
  1. Manager::init();
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